Shoe-sewing machine.



F. A SHWOHTH. u SHOE SEWING MACHINE. 'APPLIQATION FILED IAN'. 3| 1916.

Patented Feb. 51918.,

4v SHEETS-SHEET 2.

F, ASHWORTH.

SHOE SEWING MAcHnNE.

MPLICATION FILED JAN.3..i9i6.

www@ Feb. 5,191@

.4 SHEETS-SHEET 3.

w M4 i ASHWURTH.

SHGE SEWING MACHINE. APPLICATxoN lFILED 1AN.3.1916,

Fateuted Febi, M18.

4 SHEETS--SHEET 4 i lever 36 when the the presser foot is varied inaccordance with the thickness ofthe work. The work is fed by the lateralswinging movement of the awl bar on its pivot while the awlis-projected, into engagement with thelwork. The mech@ `anisim forimparting the lateral feed movement to the awl bar comprisesa link 26pivotally connected at one end to the awl` bar and at the other to anarm 28 fixed to a rock shaft 30. -A second arm 32 is secured to the rockshaft 30 and-is connected by .4 means of a link 34 t0 a lever 36pivotedat 38 on the machine frame, and provided with j nism are in thepositions which they occu y at the beginning lof a work feeding stro e.With this construction the adjustment of vthe bolt in the slot in thelever 32 will produce variations in the length of feed, while 'I.thejfeeding devices will always start vfrom the same position at thebeginning.l of their work' feeding movement, Vregardless of the lengthof the feed. j The feed point or 'awl is mounted in the awlbar so thatit.- can be projected into engagement with the work and held inengagelment therewith as the'awi/ bar is swun forward to' feed thework/and so that 1t can be 1 retracted out of engagement with the workduring the movement of the awl bar back to Vstarting osition. l In theconstruc. tion illustrated t e awl is provided with a v'shamk .which isarranged to slide in a' suit- 'fable guide in the-lower end-of the awlbar, and rack teeth 48 are formed on the shank of' the awl which areengaged by the teeth of a. pinion journaled on a shaft 52 mounted in theawl bar. A rack bar 54 is mounted to slide vertically in the lower endof the awl bar, and is formed with teeth 54u which are 'also'in meshwiththe teeth of the pinion 50, the 'width of the teeth of the pinion beine'sucient to engage both the teeth on the s ank of the awl and those onthe i rack bar. A block 56 is mountedfon a pin .curedl thereto andcarries a cam roll which engages a cam groove .72 also formed Iin thecam disk 44. Through the connections described the oscillation of thearm 68 causesthe reciprocation of the rack bar 54 in the awl bar -which.rotates the pinion 50 awl bar is brought back to its .initial positionready to begin a work feeding stroke.

The connection between the link 62 and the arm 64 is arranged so thatits center is substantially in alinement with the axis of .the rockshaft 30 and the pivotal connection between the link 62 and the lever 58.is ar' ranged so that its center liesy substantially in alinement-withthe center of the pivotal connection between the arm 28 and-thelink 26. when the awl is-projected into engagement with the work 'asshown in Fig. 4. The rei sult of this arrangement is that the movementof the feedin mechanism does not j affect the position of the lever 58with relation to the link 24 during the Work feeding movement of thefeeding devices, and the position of the awl with relation to the awlbar is substantially unchanged while the work is being fed.

Having explained the nature and object of the invention, and havingspecifically described a machine embodyin the same in its preferredform, what is c aimed is l. A shoe sewing machine having, incombination, stitch forming devices including a straight hook needle, a`rotatable horn, feeding means comprising a movable awl bar, an awlmovably mountedin the bar, means for moving the awl bar laterally, andmeans for moving the awl with relation to the awl bar into and out ofengagement with the lwork in timed relation to the lateral movements ofthe awl bar.

2. A shoe sewing machine having, in combination, stitch forming, devicesincluding a straight hook needle, a rotatable horn, feeding meanscomprising an awl bar, an awl movably mounted in the bar, means f ormovingl the awl bar laterally, and mechanism formoving thea'wl withrelation to the awl bar into and outdof engagement with the work,comprising a rack bar upon which the awl is carried, s ldably mounted inthe awl bar, a pinion rotatably mounted in the awl bar and engaging therack bar, a second rack bar slidabl-y mounted in the awl bar andengaging the pinion, and means for reciprocating the second rack bar.

3. A shoe sewing machine having, in com- -binatiom stitch formingdeviccsincluding a straight vhook needle, a rotatable horn, a resser foot,feeding means comprisin a atern'lly movable awl bar, a connection e-Maratea W into and out of engagement with the work.

4. A shoe sewing machine having, in combination, stitch formingdevice'sincluding a straight hook needle, a rotatable horn, feed ingmeans comprising an awl bar, 'means for moving the awl laterallyincluding an oscillatory leverand a linkl connecting the lever with theawl bal.7 an awl movaloly mounted in the awl bar,means for advancing andretractin the awl into and out ot engagement with t e work in timedrelation to the lateral movements of the awl bar includingr a leverypivoted on the link, a connection .between thelever and the awl, and

means for swinging the lever about its pivotal connection with the link.

i 5. it shoe. sewing machine having, in combination, stitch formingdevices including a straight hook needle, a work support, a hpresserfoot, a vvorkeeding awl, an awl bar, a connection between the presserfoot and the awl bar tovary the vertical position of the awl bar inaccordance with variations inthe vertical position of the presser footdue tochanges in the thickness of the work, means for imparting lateralmovements to the awl bar, and means for advancing and f retracting theawl with relation to the awl bar.

6. A. shoe sewing machine,having, in combination, stitch forming devicesincluding a straight hook needle, a work support, a presser foot, a work`lt'eedingi; awl, a swinging awl bar, a connection between the presserfoot and the awl bar to vary the vertical position of the awl bar inaccordance with variations in the vertical position of the presser tootdue to changes in. the thickness of the work, means for impartinglateral swinging movements to the awl bar, and means, for advancing andretracting the awl with relation to the awl bar. A 4

7. A shoe sewing machine, having in com-- bination, stitch formingdevices including a straight hook needle, a work support, a pressenroot,a work-feeding awl, a swinging awl bar, an Aawl movably mountedl in thebar, means :tor swinging the awl bar-laterally, and means for moving theawl with re lation to the awl bar into and out oi enagement with thework in timed relation to t e swinging movements of the awl bar.

8. A shoe sewing machine, having in combination, stitch forming devicesincluding a hook needle, feeding means comprising `a toy movable awlbar, an awl movably mount` A ed in the bar,'means for moving the awl hanlaterally comprising an oscillatory lever, an

A awl movably mounted in the awl bar, mechanism for advancing andretracting the awl with relation to the awl bar into and out ofengagement with the work in timed relation to the lateral movements ofthe awl bar comprising a series of relatively movable parts, aconnection between one of said parts and the awl bar, and a pivotalconnection between certain of said parts arranged to be brought intoalinement with'the axis ot the4 oscillatory lever when the awl is at thelimit of its advancing movement.

9. A shoe sewing machine, having in comf bination, stitch formingdevices including a. straight hook needle, feeding means comprising anawl bar means for moving the awl laterally includin an oscillatory everand a link connecting t e lever with the awl bar, an awl movably mountedin lthe awl bar means for advancing and retracting the aw with relationto the awl har into and out of engagement with the work in timedrelation to the lateral movements of the awl bar, in cludin a secondoscillatory lever, a lever pivote on the link and a link having apivotal connection at one end with the second oscillatory lever arrangedto be brought into alinement with the axis ot the rst oscillatory lever,and a pivotal connection at its other end with the last lever arrangedto be brought into alinement with the pivotal conu nection between thefirst oscillatory lever and the first link when the awl is at the limitof its advancing movement.

